Thanks again for the responses. Would your answer change if the resolution was for example, 1680x1050 (just curious)?

At that resolution, a move from an HD 5770 to a GTX 560 Ti is harder to justify. There will be performance gains, but when you start pairing cards that powerful with lower resolutions, you start heading into the zone of diminishing returns really fast. Having said that, if you go for a 120Hz monitor at that resolution, A GTX 560 Ti would be a great buy. Even faster cards would be well justified.

__________________For my part I know nothing with any certainty, but the sight of the stars makes me dream.